$ telnet localhost 25
! Trying 127.0.0.1...
! Connected to localhost.
! Escape character is '^]'.
< 220 qwurx ESMTP
> HELO localhost
< 250 qwurx
> MAIL FROM: <shmem@qwurx>
< 250 ok
> RCPT TO: <shmem@qwurx>
< 250 ok
> DATA
< 354 go ahead
> From: shmem <shmem@qwurx>
> To: myself <shmem@qwurx>
> Content-Type: text/plain; charset=iso-8859-1
> Content-Transfer-Encoding: 8bit
> Subject: Benevolent Advice
>
> get a clue, quick ;-)
> .
< 250 ok 1169199915 qp 22510
> QUIT
< 221 qwurx
! Connection closed by foreign host.